<template>
  <div class="app-container">
    <!-- 顶部搜索 -->
    <el-form :model="queryParams" ref="queryForm" size="small" v-show="showSearch" label-width="68px">
      <el-row :gutter="24">
        <el-col :span="12">
                  <el-form-item label="标题" prop="title">
                    <el-input
                        v-model="queryParams.title"
                        placeholder="请输入标题"
                        clearable
                        @keyup.enter.native="handleQuery"
                    />
                  </el-form-item>
        </el-col>
        <<el-col :span="12">
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
      </el-col>
      </el-row>
    </el-form>

    <!-- 顶部按钮 -->
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
            type="primary"
            icon="el-icon-plus"
            size="mini"
            @click="handleAdd"
            v-hasPermi="['lundao:banner:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="primary"
            icon="el-icon-edit"
            size="mini"
            :disabled="single"
            @click="handleUpdate"
            v-hasPermi="['lundao:banner:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="primary"
            icon="el-icon-delete"
            size="mini"
            :disabled="multiple"
            @click="handleDelete"
            v-hasPermi="['lundao:banner:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="primary"
            icon="el-icon-download"
            size="mini"
            @click="handleExport"
            v-hasPermi="['lundao:banner:export']"
        >导出</el-button>
      </el-col>

      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <!-- 表格 -->
    <el-table @row-click="clickRow" ref="table" highlight-current-row
              :header-cell-style="{background:'#d0cece',color:'#000000',fontWeight:'bold'}"
              height="300" class="fixedTableTwo" v-loading="loading" :data="bannerList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="序号" align="center" type="index" :index="indexMethod" />
              <el-table-column label="图片" align="center" prop="image" width="100">
                <template slot-scope="scope">
                  <image-preview :src="scope.row.image" :width="50" :height="50"/>
                </template>
              </el-table-column>
              <el-table-column label="标题" align="center" prop="title" />
              <el-table-column label="描述" align="center" prop="description" />
              <el-table-column label="排序" align="center" prop="sort" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
              size="mini"
              type="text"
              icon="el-icon-edit"
              @click="handleUpdate(scope.row)"
              v-hasPermi="['lundao:banner:edit']"
          >修改</el-button>
          <el-button
              size="mini"
              type="text"
              icon="el-icon-delete"
              @click="handleDelete(scope.row)"
              v-hasPermi="['lundao:banner:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页组件 -->
    <pagination
        v-show="total>0"
        :total="total"
        :page.sync="queryParams.pageNum"
        :limit.sync="queryParams.pageSize"
        @pagination="getList"
    />

    <!-- 添加或修改轮播图对话框 -->
    <vxe-modal :title="title" v-model="open" width="500px" showFooter show-zoom resize>
      <el-form ref="formDialog" :model="form" :rules="rules" label-width="80px">
                        <el-form-item label="图片" prop="image">
                          <image-upload v-model="form.image"/>
                        </el-form-item>
                        <el-form-item label="标题" prop="title">
                          <el-input v-model="form.title" placeholder="请输入标题" />
                        </el-form-item>
                        <el-form-item label="描述" prop="description">
                          <el-input v-model="form.description" placeholder="请输入描述" />
                        </el-form-item>
                        <el-form-item label="排序" prop="sort">
                          <el-input v-model="form.sort" placeholder="请输入排序" />
                        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer  dialog-footer-center">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </vxe-modal>
  </div>
</template>

<script>
  import { listBanner, getBanner, delBanner, addBanner, updateBanner } from "@/api/lundao/banner";
  import {getToken} from "@/utils/auth";
  export default {
    name: "Banner",
    data() {
      return {
        selectedRow: null, // 保存当前选中的行
        // 遮罩层
        loading: true,
        // 选中数组
        ids: [],
        // 非单个禁用
        single: true,
        // 非多个禁用
        multiple: true,
        // 显示搜索条件
        showSearch: true,
        // 总条数
        total: 0,
        // 轮播图表格数据
              bannerList: [],
        // 弹出层标题
        title: "",
        // 是否显示弹出层
        open: false,
        // 查询参数
        queryParams: {
          pageNum: 1,
          pageSize: 10,
                        title: null,
        },
        // 表单参数
        form: {},
        // 表单校验
        rules: {
                        image: [
                    { required: true, message: "图片不能为空", trigger: "blur" }
                  ],
                        title: [
                    { required: true, message: "标题不能为空", trigger: "blur" }
                  ],
                        description: [
                    { required: true, message: "描述不能为空", trigger: "blur" }
                  ],
                        sort: [
                    { required: true, message: "排序不能为空", trigger: "blur" }
                  ]
        },
      };
    },
    created() {
      this.getList();
    },
    methods: {
      //点击行 获取行
      clickRow(row) {
        this.selectedRow = row; // 更新选中的行
        const table = this.$refs.table;
        const selectedRows = table.selection;

        // 否则取消之前选中的行，并选中当前点击的行
        selectedRows.forEach(selectedRow => {
          table.toggleRowSelection(selectedRow);
        });
        table.toggleRowSelection(row);
      },
      /** 自定义序号 */
      indexMethod(index){
        let pageNum = this.queryParams.pageNum - 1;
        if((pageNum!==-1 && pageNum!==0)){
          return (index + 1) + (pageNum  * this.queryParams.pageSize);
        }else{
          return (index + 1)
        }
      },
      /** 查询轮播图列表 */
      getList() {
        this.loading = true;
        listBanner(this.queryParams).then(response => {
          this.bannerList = response.rows;
          this.total = response.total;
          this.loading = false;
        });
      },
      // 取消按钮
      cancel() {
        this.open = false;
        this.reset();
      },
      // 表单重置
      reset() {
        this.form = {
                        bannerId: null,
                        image: null,
                        title: null,
                        description: null,
                        sort: null
        };
        this.resetForm("formDialog");
      },
      /** 搜索按钮操作 */
      handleQuery() {
        this.queryParams.pageNum = 1;
        this.getList();
      },
      /** 重置按钮操作 */
      resetQuery() {
        this.resetForm("queryForm");
        this.handleQuery();
      },
      // 多选框选中数据
      handleSelectionChange(selection) {
        this.ids = selection.map(item => item.bannerId)
        this.single = selection.length!==1
        this.multiple = !selection.length
      },
      /** 新增按钮操作 */
      handleAdd() {
        this.reset();
        this.open = true;
        this.title = "添加轮播图";
      },
      /** 修改按钮操作 */
      handleUpdate(row) {
        this.reset();
        const bannerId = row.bannerId || this.ids
        getBanner(bannerId).then(response => {
          this.form = response.data;
          this.open = true;
          this.title = "修改轮播图";
        });
      },
      /** 提交按钮 */
      submitForm() {
        this.$refs["formDialog"].validate(valid => {
          if (valid) {
            if (this.form.bannerId != null) {
              updateBanner(this.form).then(response => {
                this.$modal.msgSuccess("修改成功");
                this.open = false;
                this.getList();
              });
            } else {
              addBanner(this.form).then(response => {
                this.$modal.msgSuccess("新增成功");
                this.open = false;
                this.getList();
              });
            }
          }
        });
      },
      /** 删除按钮操作 */
      handleDelete(row) {
        const bannerIds = row.bannerId || this.ids;
        this.$modal.confirm('确定删除选中记录？').then(function() {
          return delBanner(bannerIds);
        }).then(() => {
          this.getList();
          this.$modal.msgSuccess("删除成功");
        }).catch(() => {});
      },
  /** 导出按钮操作 */
  handleExport() {
    this.download('lundao/banner/export', {
      ...this.queryParams
    }, `banner_${new Date().getTime()}.xlsx`)
  },
  }
  };
</script>
